Crystallographic analysis of the complex between triosephosphate isomerase and 2-phosphoglycolate at 2.5-A resolution: implications for catalysis.Lolis, E., Petsko, G.A.
(1990) Biochemistry 29: 6619-6625
- PubMed: 2204418
- PubMed Abstract:
- Structure of Yeast Triosephosphate Isomerase at 1.9-Angstroms Resolution
Lolis, E.,Alber, T.,Davenport, R.C.,Rose, D.,Hartman, F.C.,Petsko, G.A.
(1990) Biochemistry 29: 6609
- Crystallography and Site-Directed Mutagenesis of Yeast Triosephosphate Isomerase. What Can We Learn About Catalysis from a (Double Quote)Simple(Double Quote) Enzyme (Question Mark)
Alber, T.C.,Davenportjunior, R.C.,Giammona, D.A.,Lolis, E.,Petsko, G.A.,Ringe, D.
(1987) Cold Spring Harbor Symp.Quant.Biol. 52: 603
- On the Three-Dimensional Structure and Catalytic Mechanism of Triose Phosphate Isomerase
Alber, T.,Banner, D.W.,Bloomer, A.C.,Petsko, G.A.,Phillips, D.,Rivers, P.S.,Wilson, I.A.
(1981) Philos.Trans.R.Soc.London,Ser.B 293: 159
- Crystallization of Yeast Triose Phosphate Isomerase from Polyethylene Glycol. Protein Crystal Formation Following Phase Separation
Alber, T.,Hartman, F.C.,Johnson, R.M.,Petsko, G.A.,Tsernoglou, D.
(1981) J.Biol.Chem. 256: 1356
The binding of the transition-state analogue 2-phosphoglycolate to triosephosphate isomerase from yeast has been investigated crystallographically. An atomic model of the enzyme-inhibitor complex has been refined against data to 2.5-A resolution to a ...
The binding of the transition-state analogue 2-phosphoglycolate to triosephosphate isomerase from yeast has been investigated crystallographically. An atomic model of the enzyme-inhibitor complex has been refined against data to 2.5-A resolution to a final R factor of 0.18. The interactions between the inhibitor and enzyme have been analyzed. The inhibitor forms hydrogen bonds to the side chains of His 95 and Glu 165. The latter hydrogen bond confirms that Glu 165 is protonated upon PGA binding. The structure of the complexed enzyme has been compared to that of the unbound form of the enzyme, and conformational changes have been observed: the side chain of Glu 165 moves over 2 A and a 10-residue flexible loop moves over 7 A to close over the active site. Spectroscopic results of phosphoglycolic acid binding to triosephosphate isomerase that have been amassed over the years are also explained in structural terms. The implications for catalysis are noted.
Department of Chemistry, Massachusetts Institute of Technology, Cambridge 02139.